    <SEC-DOCUMENT>0001466593-23-000070-index.html : 20230301
    <SEC-HEADER>0001466593-23-000070.hdr.sgml : 20230301
    <ACCEPTANCE-DATETIME>20230301095718
    ACCESSION NUMBER:		0001466593-23-000070
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20221231
    FILED AS OF DATE:		20230301
    DATE AS OF CHANGE:		20230301
    EFFECTIVENESS DATE:		20230301

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Otter Tail Corp
    		CENTRAL INDEX KEY:			0001466593
    		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
    		IRS NUMBER:				270383995
    		STATE OF INCORPORATION:			MN
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-53713
    		FILM NUMBER:		23690265

    	BUSINESS ADDRESS:
    		STREET 1:		215 S CASCADE ST
    		STREET 2:		PO BOX 496
    		CITY:			FERGUS FALLS
    		STATE:			MN
    		ZIP:			56538-0496
    		BUSINESS PHONE:		866-410-8780

    	MAIL ADDRESS:
    		STREET 1:		215 S CASCADE ST
    		STREET 2:		PO BOX 496
    		CITY:			FERGUS FALLS
    		STATE:			MN
    		ZIP:			56538-0496

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Otter Tail Holding Co
    		DATE OF NAME CHANGE:	20090618
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>a2022annualreport-finalseca.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: a2022annualreport-finalseca.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>